<template>
  <div class="my-tab-bar">
    <!-- 渲染菜单项 -->
    <div
      class="tab-item"
      v-for="(obj, index) in list"
      :key="index"
      @click="changeShow(index, obj.componentName)"
      :class="{current: isShow === index}"
    >
      <!-- 图标 -->
      <span
        class="iconfont"
        :class="obj.iconText"
      ></span>
      <!-- 文字 -->
      <span>{{ obj.text }}</span>
    </div>
  </div>
</template>

<script>
export default {
  props: {
    list: {
      type: Array,
      required: true,
      validator(value) {
        return value.length >= 2 && value.length <= 5
      }
    }
  },
  data() {
    return {
      isShow: 0 //初始第一项高亮
    }
  },
  methods: {
    changeShow(index, name) {
      // 修改要显示的索引
      this.isShow = index
      // 给app传要显示的组件名
      this.$emit('toggleFn', name)
    }
  }
}
</script>

<style lang="less" scoped>
.my-tab-bar {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 50px;
  border-top: 1px solid #ccc;
  display: flex;
  justify-content: space-around;
  align-items: center;
  background-color: white;
  .tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
}

.current {
  color: #1d7bff;
}
</style>